A man was shot and killed and his son wounded early Sunday in the 800 block of Elm Street, Reading police said.

When police arrived they learned an acquaintance of the victims was holding the man suspected to be the gunman nearby.

The acquaintance, 28, had witnessed the shooting and chased the suspect, yelling for him to stop, police said.

Police were first dispatched about 2:20 a.m. to Elm Street, where they found the 49-year-old victim dead on the sidewalk. They also found that his 29-year-old son had been shot in the upper torso and driven to a local hospital in a private vehicle.

The home invasion occurred on the 1200 block of Manatawny Road some time Sunday before 2:30 p.m. Residents of the home were reportedly tied up inside.

Around 2:30 p.m., Lower Pottsgrove Police were dispatched to the 2100 block of Sanatoga Station Road. Sergeant Tim Walters, of the Lower Pottsgrove Police, said it was for a report of a “suspicious man waving down traffic.”

In an effort to eliminate overcrowding at the Montgomery County Prison, a new 512-bed addition has been constructed. The new wing is completed and pending final inspection before prisoners can move in.

The new wing is a departure from a traditional cell block. Prisoners will be housed in a dormitory setting, without bars. Bunk-beds are placed along walls in large open rooms. The new wing is for nonviolent offenders. Of course, there are plenty of locked doors, guards and cameras.

The prison was built to house 1240 inmates. It was then expanded and currently is home to about 1800 prisoners.